Four blade propeller hub



FIG. 1 is a perspective view of a four blade propeller hub showing my new design, the broken lines are for illustrative purposes only and form no part of the claimed design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 6 is a rear elevational view thereof;

FIG. 7 is a front elevational view thereof; and,

FIG. 8 is a cross sectional view taken along line 8--8 of FIG. 6. 

The ornamental design for a four blade propeller hub, as shown and described. 